臨床整形外科46巻10号

2011年10月発行

臨床経験

腰椎後方進入椎体間固定術後ケージ脱転例の検討

著者： 木村浩明¹ 四方實彦¹ 尾立征一¹ 山村知¹ 添田恒光¹

所属機関： ¹学研都市病院整形外科・脊椎脊髄センター

ページ範囲：P.947 - P.953

　当院で腰椎変性疾患に対して腰椎後方進入椎体間固定術を施行した1,070例中，ケージが脱転した9例(男性7例，女性2例)から，そのリスクファクターについて検討した．平均年齢は68歳，後側方固定術も併用した固定椎間数は平均3.9椎間，術前の平均椎間板高は11.9mm，平均椎体間可動域は10.7°で，9例中6例がL5/S脱転例であった．L5/S，椎間板高が高く椎間可動域の大きい洋梨状の椎間板形状，多椎間固定の末端椎間がリスクファクターと考えられ，これらを有する症例にはケージ選択も含めて注意を要する．

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